1255217 has 4 divisors (see below), whose sum is σ = 1267056. Its totient is φ = 1243380.

The previous prime is 1255211. The next prime is 1255237. The reversal of 1255217 is 7125521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7125521 = 13 ⋅548117.

It is a cyclic number.

It is not a de Polignac number, because 1255217 - 2⁴ = 1255201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1255192 and 1255201.

It is not an unprimeable number, because it can be changed into a prime (1255211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5759 + ... + 5972.

It is an arithmetic number, because the mean of its divisors is an integer number (316764).

2^1255217 is an apocalyptic number.

It is an amenable number.

1255217 is a deficient number, since it is larger than the sum of its proper divisors (11839).

1255217 is a wasteful number, since it uses less digits than its factorization.

1255217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11838.

The product of its digits is 700, while the sum is 23.

The square root of 1255217 is about 1120.3646727740. The cubic root of 1255217 is about 107.8713889720.

The spelling of 1255217 in words is "one million, two hundred fifty-five thousand, two hundred seventeen".